1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Fittoniya [83]
3 years ago
12

Researchers noted that about half of all species of bacteria contain small segments of DNA of about 20-50 base pairs derived fro

m plasmids or viruses. The phrase clustered regularly interspaced short palindromic repeats (CRISPR) describes the organization of these viral DNA segments in the bacterial genome. Bacteria use CRISPR to: (Select all that apply.)
"remember" the first time it was infected with a virus.

identify viral DNA by complementary base pairing with RNA.

transcribe RNA that combines with a protein that has a DNA-cleaving function.

transcribe RNA that combines with a protein that has a RNA-cleaving function

identify viral DNA by complementary base pairing with template DNA.
Biology
1 answer:
kakasveta [241]3 years ago
5 0

The correct answers are:  

• transcribe RNA that combines with a protein that has a DNA-cleaving function.  

• identify viral DNA by complementary base pairing with template DNA.

CRISPR is a DNA sequence found in bacteria (or other prokaryotic cell), derived from DNA fragments from viruses that have previously infected that bacteria. Bacteria use CRISPR to destroy DNA from next similar viruses. So, it is form of antiviral defense in bacteria.

Cas9  is an RNA-guided DNA endonuclease enzyme (DNA-cleaving function) associated with the CRISPR that cleave specific sequences of DNA complementary to the CRISPR sequence.

You might be interested in
The molecules DNA and RNA are both nucleic acids, but they differ in structure and function.
valentinak56 [21]

Part B: AUG-GCG-AAC-UGU

Part C:It will change but the only one the will change is the A and U.

5 0
3 years ago
Help me with this I willl mark you brainlyest I got test due
erica [24]
Was AA, KK, and TT correct?
3 0
3 years ago
How many neurons are in human brain?
damaskus [11]
Heaps and heaps and heaps and heaps of them!


7 0
3 years ago
Read 2 more answers
Help help help! It’s due in a few mins!
Dmitriy789 [7]
First answer: 4
Second answer: I think 2?
Third answer: 5
Fourth answer: 1
4 0
3 years ago
Read 2 more answers
Investigate substances containing carbon or oxygen that relate to biological processes. Explain their main function in those pro
Scrat [10]

Answer:

I hope this helps!!!1

Explanation:

Carbon and oxygen are independent of each other but are very closely connected as well as interdependent. The following article will cover information that will help you understand the carbon-oxygen cycle in detail.

Life on planet Earth continues due to the presence of organic as well as inorganic nutrients present in nature. These nutrients need to be continuously recycled. If this doesn’t happen, all the nutritive resources in the world will get extinguished completely. No nutrients means no life on Earmeano, for the life cycle of every living being, unicellular or multicellular organism to sustain, recycling the nutrients is very important. One of the important cycles is the carbon-oxygen cycle.

The Process of Carbon-Oxygen Cycle

There are four steps involved in the completion of this cycle. These methods are discussed below:

Photosynthesis

Plants undergo photosynthesis which helps them produce energy and food for themselves. During this process, plants take in carbon dioxide (CO2) and absorb water (H2O) with the help of their roots. The chlorophyll present in the leaves and the energy from the sun, help convert CO2 and H2O into Oxygen O2, sugar, and water vapor. Oxygen (O2) is released by plants as a by-product of the atmosphere.

Formula for Photosynthesis

CO2 + H2O + Light ———-> (CH2O) + O2

The carbon dioxide from air and water from the soil in presence of light (energy) is taken by the plants and converted into carbohydrates and oxygen as by-products.

Respiration

Just as plants carry out photosynthesis, animals carry out respiration. Respiration occurs when animals take in oxygen from the air along with simple sugars from their food. This helps in the release of carbon dioxide, water, and energy from the animal body. During cellular respiration, animals require O2 while inhalation. When they exhale the waste product of cellular respiration, they release CO2 into the atmosphere again.

Formula for Respiration

(CH2O) + O2 ———-> CO2 + H2O + Energy

The carbohydrates taken from food like plants or carbon-based compounds along with oxygen are converted to carbon dioxide which is released into the air along with water and energy during respiration.

Combustion

It is a process of burning that occurs naturally in nature. For example, volcanic eruptions are natural combustion processes where carbon dioxide is released into the atmosphere due to burning. Nowadays, many environmental pollutants cause an increase in the amount of CO2 in the air. These include cars, factories, burning of woods, coal, nuclear energy, gas, etc. This irresponsible combustion and release of excessive carbon dioxide and other harmful gases in the environment is the major contributing factor to today’s global warming.

Decomposition

After the death of any living organism, i.e., unicellular or multicellular organism, it gets decomposed. This decomposition means insects, fungi, and bacteria (together called decomposers), help in breaking down the cellular components of the dead organism into its basic elements. These elements include water, calcium, nitrogen, carbon, and oxygen. Thus, decomposers help in the release of oxygen and carbon dioxide back into the atmosphere as their metabolic waste products.

The entire cycle can be summarized as, plants taking in carbon dioxide and releasing oxygen during photosynthesis. This oxygen released is taken up by animals who release carbon dioxide after carrying out respiration. Thus, the recycling of carbon and oxygen in the atmosphere will continue as long as respiration and photosynthesis occur. This also proves that to sustain life, plants are very important as they are the major contributors to the amount of oxygen present in the atmosphere. Although both cycles occur independently, they are, in a small way, interconnected to each other.

8 0
2 years ago
Other questions:
  • Explain the difference between a pure substance and a homogeneous mixture
    13·2 answers
  • According to chargaff's rule, if the dna of a species contains 20% adenine, what percent of guanine will it
    8·1 answer
  • A forest is cut down to make room for a housing development. Which population is most likely to survive?
    5·2 answers
  • After scientists collect data during a scientific experiment, what step do they usually take next
    5·2 answers
  • All members of the plant kingdom contains chlorophyll? true or false
    12·2 answers
  • Twoi or more atoms can be held together through schared
    12·1 answer
  • Which of these is most likely to happen as a result of the solar flare?
    12·2 answers
  • Which pieces of equipment would be most useful in holding 250mL of ice water and then
    11·1 answer
  • In the 1800s, why was there a greater need for labor unions than there is now?
    12·1 answer
  • For anyone who answers ill give points!
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!